# Copyright 2017 Open Source Robotics Foundation, Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

import unittest

from rclpy.exceptions import InvalidNamespaceException
from rclpy.validate_namespace import validate_namespace


class TestValidateNamespace(unittest.TestCase):

    def test_validate_namespace(self):
        tests = [
            '/my_ns',
            '/',
        ]
        for topic in tests:
            # Will raise if invalid
            validate_namespace(topic)

    def test_validate_namespace_failures(self):
        # namespace must not be empty
        with self.assertRaisesRegex(InvalidNamespaceException, 'empty'):
            validate_namespace('')
        # namespace must start with /
        with self.assertRaisesRegex(InvalidNamespaceException, 'must be absolute'):
            validate_namespace('invalid_namespace')


if __name__ == '__main__':
    unittest.main()
